Stainless Steel Material Support High Pressure Various Application-It has foster fittings at both ends,can use on many model air gun. The charging system extends the line from your tank to the re- fill station. TUXING Pcp Paintball Airsoft Fill Whip Hose Extension 4500 Psi PCP - 24 inch | Skip to main content TUXING 4500Psi Pcp Paintball Airsoft Fill Whip Hose Extension,10" DN2 The charging system extends the line from your tank to the re-fill station. stainless steel adapter support 4500 psi high pressure ,and the surface is polished plating, very strong and beautiful.